December 20, 1942 – Operation Mars was the codename for the an offensive operation launched by Soviet forces against German forces during World War II. It took place between 25 November and 20 December 1942 around the Rzhev salient in the vicinity of Moscow. The offensive was a joint operation of the Soviet Western Front and Kalinin Front coordinated by Georgy Zhukov. The basic plan of the offensive was to eliminate the Rzhev salient by launching multiple, coordinated thrusts from all sides of the salient. After the destruction of the German 9th Army, the forces would regroup and link up with the 5th and 33rd Armies which were to attack along the Moscow-Vyazma highway. This latter part of the operation was codenamed Operation Jupiter When resistance around Vyazma was neutralized, the 9th and 10th tank corps and the 3rd Tank Army would then penetrate deeper into the rear of Army…